#!/usr/bin/python2

#import libraries
from vismach import *
import hal
import math
import sys

#----------------------------------------------------------------------------------------------------------------------------------
# Starting and defining

# used for diameter for versions less than 2.8.
# it gives us way to access variable values from vismach script.
import linuxcnc
s = linuxcnc.stat()
s.poll()

# Here is where we define pins that linuxcnc will send
# data to, in order to make movements.
# We will need 5 pins, 3 for motion and 2 for tool stats.
# tooldiameter isn't really used but if you are using 2.8 you can make couple changes
# in this file, and uncomment last line in HAL file.
# add joints. Mill has 3.
c = hal.component("rolfmill")
c.newpin("jointX", hal.HAL_FLOAT, hal.HAL_IN)
c.newpin("jointY", hal.HAL_FLOAT, hal.HAL_IN)
c.newpin("jointZ", hal.HAL_FLOAT, hal.HAL_IN)

# tool length and diameter pins?
c.newpin("toollength", hal.HAL_FLOAT, hal.HAL_IN)
c.newpin("tooldiameter", hal.HAL_FLOAT, hal.HAL_IN)

# tells loadusr pins is ready
c.ready()

# Used for tool cylinder
# it will be updated in shape and length by function below.
toolshape = CylinderZ(0)
toolshape = Color([1, .5, .5, .5],[toolshape])

# updates tool cylinder shape.
class HalToolCylinder(CylinderZ):
    def __init__(self, comp, *args): 
        # get machine access so it can
        # change itself as it runs
        # specifically tool cylinder in this case.
        CylinderZ.__init__(self, *args)
        self.comp = c
    def coords(self):
        # update data -  not needed if using 2.8 and self.comp["tooldiameter"]
        # 2.7 does not have direct pin for diameter so this is workaround. commented out code is direct way to do it.
        s.poll() # 2.8 don't need this, comment out if using 2.8.
        # get diameter and divide by 2 to get radius.
        rad = ( s.tool_table[s.tool_in_spindle].diameter ) # 2.7 workaround
        #rad = ( self.comp["tooldiameter"] )  # 2.8 only
        rad = rad / 2 # change to rad
        # this instantly updates tool model but tooltip doesnt move till -
        # tooltip, the drawing point will NOT move till g43h(tool number) is called, however.
        # Tool will "crash" if h and tool length does not match.
        leng = s.tool_table[s.tool_in_spindle].zoffset 
        # Update tool length when g43h(toolnumber) is called, otherwise stays at 0 or previous size.
        # commented out as I prefer machine to show actual tool size right away.
        #leng = self.comp["toollength"]
        return (-leng, rad, 0, rad)


#----------------------------------------------------------------------------------------------------------------------------------
# Concept of machine design

# The model follows logical tree design - picture the tree, with branch and smaller branches off it
# if you move the larger branch, smaller branches will move with it, but if you move smaller branch larger will not.
#
# Machine design follows that conceptal design, so for example if you move X, it can move on its own, but if you move Y,
# it will also move X assembly, as it is attached to Y assembly.
# so for this machine, tree looks like this:

# model
#   |
#   |---frame
#   |     |
#   |     |---base
#   |     |
#   |     |---column
#   |     |
#   |     |---top
#   |
#   |
#   |---yassembly
#   |      |
#   |      |
#   |      |---xassembly
#   |      |      |
#   |      |      |
#   |      |      |---xbase
#   |      |      |
#   |      |      |---work
#   |      |
#   |      |
#   |      |---ybase
#   |
#   |
#   |---zassembly
#           |
#           |
#           |---zframe
#           |     |
#           |     |---zbody
#           |     |
#           |     |---spindle
#           |
#           |
#           |---toolassembly
#                     |
#                     |---cat30
#                     |
#                     |---tool
#                          |
#                          |---tooltip
#                          |
#                          |---(tool cylinder function)

# As you can see, lowest parts must exist first before it can be grouped with others into assembly.
# So you build upwards from lowest point in tree and assembly them together.
# Same is applicable for any design of machine. Look at machine arm example and you will see that it starts
# with tip and adds to larger part of arm then it finally groups with base.


#----------------------------------------------------------------------------------------------------------------------------------
# Starting with fixed frame

# start creating base itself, floor and column for z. box is centered on 0,0,0
base = BoxCentered(200, 560, 20)
# translate it so top of base is at zero
base = Translate([base], 0,0,-10)

# column, attached to base on side. 
# Box() accepts extents
# ie -100 to 100 is 200 wide, and rightmost is at -100 on coord.
#        Box(x rightmost, y futherest, z lowest, x leftmost, y nearest, z highest)
column = Box(        -60,        -260,        0,         60,      -200,       400)

# add block on top
# not really needed, but I like how it looks with it.
# bare column looks little bit strange for some reason.
top = Box(-80,-280,400, 80,-160,440)

# now fuse it into "frame"
frame = Collection([base, column, top])
# color it grayish
frame = Color([.8,.8,.8,1],[frame])


#----------------------------------------------------------------------------------------------------------------------------------
# Moving parts section

# Start with X, Y then finally Z with tool and spindle.

# X table addition
xbase = BoxCentered(1000,200,30)
# let's color it blue
xbase = Color([0,0,1,1], [xbase])
# Move table so top is at zero for now,
# so work (default 0,0,0) is on top of table.
xbase = Translate([xbase], 0,0, -15)

# now create work which would be defined by Linuxcnc.
# I suspect we would need to define shape but not enough is known.
# for now just create an point that would be bottom center of stock.
work = Capture()

# group work and xbase together so they move together.
xassembly = Collection([xbase, work])
# work is now defined and grouped, and default at 0,0,0, or
# currently on top of x part table.
# so we move table group upwards, taking work with it.
xassembly = Translate([xassembly], 0,0, 35)

# Must define part motion before it becomes part of collection.
# Must have arguments, object itself, c (defined above), then finally scale from the pin to x y z.
# since this moves solely on X axis, only x is 1, rest is zero.
# you could use fractions for say axis that moves in compound like arm for example
# but this machine is very simple, so all axis will be purely full on axis and zero on other axis.
xassembly = HalTranslate([xassembly], c, "jointX", 1, 0, 0)

# Y assembly creation
ybase = BoxCentered(200, 200, 10)
# colorize it green so we can see it seperate from frame.
ybase = Color([0,1,0,1], [ybase])
# don't define translation for this one, as y also moves X table.
# translating this would move itself alone. You want it to move X parts also.

# X table is moved by Y base, so we have to make X child of Y.
# now define collection of ybase and xassembly.
yassembly = Collection([ybase, xassembly])
# define its motion first before translate.
yassembly = HalTranslate([yassembly], c, "jointY", 0, 1, 0)
# Now that translate is locked with part, 
# move it upwards so its on frame base.
yassembly = Translate([yassembly], 0,0,5)

# spindle head
# define small cylinder where tool will be attached to.
# It is shallow, basically exposed end of "cat30" toolholder.
# let's pretend machine uses cat30.
cat30 = CylinderZ(0, 30, 20, 40) # cone wider top smaller bottom
# color it red, as in danger, tool!
cat30 = Color([1,0,0,1], [cat30])

# Define tool and grab such model information from linuxcnc
# tooltip is initially in vismach "world" 0,0,0. 
# what it does is place where line drawing is in world, so
# you can see where machine think tip of tool is.
# first capture it, so we can use it and move it to where
# defined end of tool is.
tooltip = Capture()

# Now that we have tooltip, let's attach it to cylinder function (see above)
# it creates cylinder then translates tooltip to end of it.
tool = Collection([
	Translate([HalTranslate([tooltip], c, "toollength", 0, 0, -1)], 0, 0, 0),
	HalToolCylinder(toolshape)
	])

# Since tool is defined, lets attach it to cat30
# Group cat30 and tooltip
toolassembly = Collection([cat30, tool])
# now that tool is properly attached, we can move it
# and tool will "move" with it now.
# BUT we need to build rest of head in such way that TOP of head is defined as Z zero.
# Move it so it attaches to bottom of spindle body.
toolassembly = Translate([toolassembly],0,0,-120)

# Start building Z assembly head, including spindle and support
# top is at zero as I want top to be defined as Z home top.
spindle = CylinderZ(-100, 60, 0, 60) # top is at zero
# define rest of head using Box
zbody = Box(-30, -200, 0, 30, 0, -100)

# fuse into z assembly
zframe = Collection([zbody, spindle])
# color it yellow
zframe = Color([1,1,0,1], [zframe])

# Now that all parts are created, let's group it and finally make Z motion
zassembly = Collection([zframe, toolassembly])
# define Z motion
zassembly = HalTranslate([zassembly], c, "jointZ", 0, 0, 1)
# Now that motion is defined,
# we can now move it to Z home position.
zassembly = Translate([zassembly], 0,0, 400)

#----------------------------------------------------------------------------------------------------------------------------------
# Getting it all together and finishing model

# Assembly everything into single model.
# xassembly is already included into yassembly so don't need to include it.
model = Collection([frame, yassembly, zassembly])

# Finally, call main() with parameter to let linuxcnc know.
# parameter list:
# final model name must include all parts you want to use
# tooltip (special for tool tip inclusuion)
# work (special for work part inclusion)
# size of screen (bigger means more zoomed out to show more of machine)
# last 2 is where view point source is.
main(model, tooltip, work, 600, lat=-75, lon=215)
















